I have found that AnyDVD errors popping up regarding copy protected discs and/or CSS keys are sometimes caused by an optical drive, either a DVD-ROM reader or a DVD writer used for reading, which has not had the region code properly set on first use. Usually, a new drive will automatically set the region code the same as the first disc you put in it after the drive is installed.
If, however, the first disc inserted happens to be a copy from which the region code has been removed or set to some universal region code or is from a foreign region, many problems can develop on subsequent use.
Check all your DVD drives to be sure that the region code has been properly set for the region that you're in and, if not, change the region code to the correct one for your region.